Results 91 to 100 of about 109,915 (264)
Analysis of BDS-3 Onboard Clocks Based on GFZ Precise Clock Products
Remote Sensing, 2022 The characteristics and performance of satellite clocks are important to the positioning, navigation, and timing (PNT) services of Global Navigation Satellite System (GNSS) users.
Tao Geng, Rui Jiang, Yifei Lv, Xin Xie
doaj +1 more source
Remote Sensing, 2019 In May 2016, the availability of GNSS raw measurements on smart devices was announced by Google with the release of Android 7. It means that developers can access carrier-phase and pseudorange measurements and decode navigation messages for the first ...
Jianghui Geng +4 more
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, 2019 Baseline generation for tracking applications is a difficult task when working with real world radar data. Data sparsity usually only allows an indirect way of estimating the original tracks as most objects' centers are not represented in the data.
Appenrodt, Nils +6 more
core +1 more source
Asymptotically efficient GNSS trilateration [PDF]
Signal Processing, 2017 Localization based on the reception of radio-frequency waveforms is a crucial problem in many civilian or military applications. It is also the main objective of all Global Navigation Satellite System (GNSS). Given delayed and Doppler shifted replicas of the satellites transmitted signals, the most widespread approach consists in a suboptimal two-step ...
Vincent, François +5 more
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Real-Time Estimation of Low Earth Orbit (LEO) Satellite Clock Based on Ground Tracking Stations
Remote Sensing, 2020 The rapid movement of low Earth orbit (LEO) satellite can improve geometric diversity, which contributes to the rapid convergence of Global Navigation Satellite System (GNSS) precise point positioning (PPP). However, the LEO onboard receiver clock cannot
Zhixin Yang +7 more
doaj +1 more source
, 2018 La conoscenza della Terra non può prescindere dall’impiego di un riferimento altimetrico connesso al campo di gravità, sia per le applicazioni scientifiche che tecniche. Tradizionalmente la quota associata a un generico punto è riferita al livello medio del mare e, in Italia, l'Ente competente per l'osservazione e il monitoraggio di tale livello è l ...
Sguerso, Domenico +5 more
openaire +2 more sources
Kinematic Measurement of the Railway Track Centerline Position by GNSS/INS/Odometer Integration
IEEE Access, 2019 Accurate absolute measurement of existing lines is a task of fundamental importance to provide scientific basis for reconstruction. Traditional railway track survey methods in combination with classical geodetic surveying apparatus such as total stations
Yukun Zhou, Qijin Chen, Xiaoji Niu
doaj +1 more source
Analyzing Anomalous Artefacts in TDS-1 Delay Doppler Maps [PDF]
, 2019 © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new ...
Benson, Craig +5 more
core +1 more source
Location Estimation and Recovery using 5G Positioning: Thwarting GNSS Spoofing Attacks [PDF]
arXiv, 2023 The availability of cheap GNSS spoofers can prevent safe navigation and tracking of road users. It can lead to loss of assets, inaccurate fare estimation, enforcing the wrong speed limit, miscalculated toll tax, passengers reaching an incorrect location, etc.
arxiv
Geodesy and Cartography, 2008 GNSS receivers provide position information in a convenient way. However, additional orientation information cannot be fulfilled directly by a single antenna receiver up to now. This paper describes an approach for determining the orientation by a single GNSS receiver based only on its own static observations.
openaire +4 more sources